Abstract:
Two kinds of typical DPD (Digital Pre-Distortion) methods are presented in the paper, which are Polynomial Estimation and LUT( look up table). The merit and shortcoming of the two DPD methods are summarized with detailed analysis of the structures of predistorter, emphasizing on precision of DPD, complexity of arithmetic, memory space and self- adaptive capacity. Signal source cdma2000 is applied for ADS simulation and experiment measurement of the two DPD methods, whose predistortion ability are analyzed deeply. The characteristics and applicability of the two methods are summarized in the end of the paper.